Disclosure of Invention
In view of the above, the present invention aims to overcome the defects in the prior art, and proposes an application of cerium-iron oxide-containing slag in preparing a radiation material.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the application of cerium-oxide-containing iron slag in preparing radiation material is that the radiation material is prepared by mixing burnt cerium-oxide-containing iron slag with dispersing agent, grinding and then mixing with adhesive solution.
Further, the cerium-containing iron slag is plate-frame filter pressing slag obtained after rare earth is leached out from rare earth iron boron, and the main compound in the cerium-containing iron slag is Fe2 O3 :56-60％，CeO2 :7.20-9.60％，Al2 O3 :0.45-1.10％，B2 O3 0.22-0.27%, coO 0.19-0.3%, REO 0.2-0.4%. (REO is removal of CeO)2 External rare earth oxide
The radiation material prepared by the cerium-iron oxide-containing slag is characterized in that: the radiation material is formed by mixing and grinding burnt iron slag containing cerium oxide and a dispersing agent and then mixing with a binder solution.
Further, the cerium-containing iron slag is plate-frame filter pressing slag obtained after rare earth is leached out from rare earth iron boron, and the main compound in the cerium-containing iron slag is Fe2 O3 :56-60％，CeO2 :7.20-9.60％，Al2 O3 :0.45-1.10％，B2 O3 :0.22-0.27％，CoO:0.19-0.3％，REO:0.2-0.4％。
Further, the binder solution is composed of (La0.36 Ce0.64 )PO4 With Al (H)2 PO4 )3 Mixing, wherein, (La0.36 Ce0.64 )PO4 With Al (H)2 PO4 )3 The mass ratio of (2) is 1:10-30, (La)0.36 Ce0.64 )PO4 With Al (H)2 PO4 )3 The sum of the mass of the binder solution is 45-60%; the temperature of the firing step is 1200-1300 ℃.
The preparation method of the radiation material comprises the following steps:
step (1) screening the iron slag containing cerium oxide, then burning, preserving heat to obtain an aggregate, grinding and screening the aggregate, and then radiating powder;
fully stirring water and a dispersing agent, adding the radiation powder into the stirring agent, stirring to form powder slurry, and grinding the powder slurry to obtain radiation slurry;
and (3) mixing and stirring the radiation slurry and the binder solution to obtain the radiation material.
Further, the cerium-containing iron slag is plate-frame filter pressing slag obtained after rare earth is leached out from rare earth iron boron, and the main compound in the cerium-containing iron slag is Fe2 O3 :56-60％，CeO2 :7.20-9.60％，Al2 O3 :0.45-1.10％，B2 O3 0.22-0.27%, coO 0.19-0.3%, REO 0.2-0.4%; the temperature of the firing step in the step (1) is 1200-1300 ℃; the time of the heat preservation step in the step (1) is 2-4 hours; the powder granularity of the radiation powder in the step (1) is less than or equal to 20 mu m and less than or equal to D50 ≤50μm。
Further, the mass ratio of the water, the dispersing agent and the radiation powder in the step (2) is 1:0.005-0.01:1-2; the powder granularity D of the radiation slurry50 Less than or equal to 1 mu m; the dispersing agent is at least one of BYK-190, RT-8040 or RT-8022.
Further, the mass ratio of the radiation slurry to the binder solution in the step (3) is 1:1-2; the binder solution in the step (3) is prepared from (La)0.36 Ce0.64 )PO4 With Al (H)2 PO4 )3 Mixing, wherein, (La0.36 Ce0.64 )PO4 With Al (H)2 PO4 )3 The mass ratio of (2) is 1:10-30, (La)0.36 Ce0.64 )PO4 With Al (H)2 PO4 )3 The sum of the mass of the binder solution is 45-60%; the stirring step in the step (3) is carried out for 0.5-2 hours.
The application of the radiation material in the preparation of industrial kilns.
The iron slag containing cerium oxide fully reacts in the firing process, so that adverse factors such as cracks and the like caused by the reaction of the radiation material applied to an industrial kiln are avoided; the iron slag containing cerium oxide does not need to be purified, and Al in the slag2 O3 The compounds such as CoO, REO and the like have higher radiation performance at different far infrared wavelengths; b in slag2O3 The mineralizer is used in the high-temperature reaction process, which is beneficial to reducing the burning reaction temperature; in the high-temperature firing process, ferric oxide in the slag reacts with cerium oxide and other rare earth to generate spinel-structured rare earth ferrite, and the radiation performance of the rare earth ferrite is Yu Yanghua iron; other compounds in the superior slag react with the cerium oxide to form stable compounds in the cerium oxide lattice, avoiding the alkaline oxide and Al (H) in the binder2 PO4 )3 And (3) reacting.
Compared with the prior art, the invention has the following advantages:
the total-wavelength integral emissivity of the radiation material is higher than 0.90 at the working temperature of 25-1250 ℃, and the energy consumption is reduced by more than 15% when the radiation material is applied in an industrial kiln compared with the traditional radiation-free material.
The radiation material directly uses cerium-oxide-containing iron slag to prepare the industrial kiln radiation material, reduces the energy consumption of the industrial kiln, and realizes the harmless, efficient and resource utilization of the cerium-oxide-containing iron slag; not only recycling valuable iron, cerium and other resources, solving the problems of environmental pollution and potential safety hazard caused by the piling of the low-end magnetic material scraps, but also providing a powerful support for the production process of recycling valuable elements such as rare earth and the like from the low-end magnetic material scraps.
The radiation material of the invention utilizes Al with high radiation performance in slag2 O3 Compounds such as CoO and REO, which are mixed with CeO2 And Fe (Fe)2 O3 The mutual synergistic effect of the materials improves the radiation performance of the materials.
The preparation method of the radiation material has the advantages of simple process, low production cost and easy control of industrial production.
Detailed Description
Unless defined otherwise, technical terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention pertains. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
The present invention will be described in detail with reference to examples.
Example 1
A preparation method of a radiation material prepared by cerium-iron oxide slag comprises the following steps:
(1) The iron slag containing cerium oxide is plate frame filter press residue after rare earth is leached out from rare earth iron boron, and the iron slag containing cerium oxide contains main compound Fe2 O3 :56％，CeO2 :7.20％，Al2 O3 :0.45％，B2 O3 0.22%, coO 0.19%, REO 0.2% (REO is CeO removal)2 External rare earth oxide), the cerium oxide-containing iron slag is burnt at 1300 ℃, the temperature is kept for 3 hours, the burnt agglomerate is ground by a vertical mill, and the granularity D is obtained after screening50 A radiation powder in the range of 20-50 μm;
(2) Adding 100 parts of water and 0.5 part of dispersing agent RT-8022 into a size mixing tank, fully stirring, adding 100 parts of radiation powder, stirring for 0.5h to form slurry, starting a pump communicated with the size mixing tank and a ball mill, circularly grinding the slurry through the ball mill, and obtaining the particle size D of the radiation powder in the slurry50 Stopping grinding when the particle size reaches 1 mu m to obtain radiation slurry;
(3) 100 parts of the components were added to a dispersion tankRadiation slurry and 100 parts of binder, the binder comprises 5% by mass (La)0.36 Ce0.64 )PO4 With mass fraction of 50% Al (H)2 PO4 )3 Mixing, namely stirring and dispersing the radiation slurry and the adhesive for 2 hours at a high speed to obtain a radiation material;
(4) Radiation material properties: the infrared emissivity tester is adopted to test that the total-wave integral emissivity of the radiant material is higher than 0.90 at the working temperature of 25-1250 ℃, and the energy consumption is reduced by 15.2% when the radiant material is applied in an industrial kiln compared with the conventional radiant-free material. The coating is coated on refractory bricks, the coating is kept at 1200 ℃ for 15min, and water quenching is carried out for 30 times without cracking and falling.
Example 2
A preparation method of a radiation material prepared by cerium-iron oxide slag comprises the following steps:
(1) The iron slag containing cerium oxide is plate frame filter press residue after rare earth is leached out from rare earth iron boron, and the iron slag containing cerium oxide contains main compound Fe2 O3 :58％，CeO2 :8.40％，Al2 O3 :0.78％，B2 O3 0.25%, coO 0.3%, REO 0.3% (REO is CeO removal)2 External rare earth oxide), the cerium oxide-containing iron slag is burnt at 1300 ℃, the temperature is kept for 3 hours, the burnt agglomerate is ground by a vertical mill, and the granularity D is obtained after screening50 A radiation powder in the range of 20-50 μm;
(2) Adding 100 parts of water and 0.5 part of dispersing agent RT-8022 into a size mixing tank, fully stirring, adding 100 parts of radiation powder, stirring for 0.5h to form slurry, starting a pump communicated with the size mixing tank and a ball mill, circularly grinding the slurry through the ball mill, and obtaining the particle size D of the radiation powder in the slurry50 Stopping grinding when the particle size reaches 1 mu m to obtain radiation slurry;
(3) 100 parts of radiation slurry and 100 parts of binder are respectively added into a dispersing tank, wherein the binder comprises 5% by mass (La)0.36 Ce0.64 )PO4 With mass fraction of 50% Al (H)2 PO4 )3 Mixing, namely stirring and dispersing the radiation slurry and the adhesive for 2 hours at a high speed to obtain a radiation material;
(4) Radiation material properties: the infrared emissivity tester is adopted to test that the total-wave integral emissivity of the radiant material is higher than 0.91 at the working temperature of 25-1250 ℃, and the energy consumption is reduced by 16.4% when the radiant material is applied in an industrial kiln compared with the conventional radiant-free material. The coating is coated on refractory bricks, the coating is kept at 1200 ℃ for 15min, and water quenching is carried out for 30 times without cracking and falling.
Example 3
A preparation method of a radiation material prepared by cerium-iron oxide slag comprises the following steps:
(1) The iron slag containing cerium oxide is plate frame filter press residue after rare earth is leached out from rare earth iron boron, and the iron slag containing cerium oxide contains main compound Fe2 O3 :60％，CeO2 :9.60％，Al2 O3 :1.10％，B2 O3 0.27%, coO 0.3%, REO 0.4% (REO is CeO removal)2 External rare earth oxide), the cerium oxide-containing iron slag is burnt at 1300 ℃, the temperature is kept for 3 hours, the burnt agglomerate is ground by a vertical mill, and the granularity D is obtained after screening50 A radiation powder in the range of 20-50 μm;
(2) Adding 100 parts of water and 0.5 part of dispersing agent RT-8022 into a size mixing tank, fully stirring, adding 100 parts of radiation powder, stirring for 0.5h to form slurry, starting a pump communicated with the size mixing tank and a ball mill, circularly grinding the slurry through the ball mill, and obtaining the particle size D of the radiation powder in the slurry50 Stopping grinding when the particle size reaches 1 mu m to obtain radiation slurry;
(3) 100 parts of radiation slurry and 100 parts of binder are respectively added into a dispersing tank, wherein the binder comprises 5% by mass (La)0.36 Ce0.64 )PO4 With mass fraction of 50% Al (H)2 PO4 )3 Mixing, namely stirring and dispersing the radiation slurry and the adhesive for 2 hours at a high speed to obtain a radiation material;
(4) Radiation material properties: the infrared emissivity tester is adopted to test that the total-wave integral emissivity of the radiant material is higher than 0.92 at the working temperature of 25-1250 ℃, and the energy consumption is reduced by 17.5% when the radiant material is applied in an industrial kiln compared with the conventional radiant-free material. The coating is coated on refractory bricks, the coating is kept at 1200 ℃ for 15min, and water quenching is carried out for 30 times without cracking and falling.
Comparative example 1
A preparation method of a radiation material prepared by cerium-iron oxide slag comprises the following steps:
(1) The iron slag containing cerium oxide is plate frame filter press residue after rare earth is leached out from rare earth iron boron, and the iron slag containing cerium oxide contains main compound Fe2 O3 :56％，CeO2 :7.20％，Al2 O3 :0.45％，B2 O3 0.22%, coO 0.19%, REO 0.2% (REO is CeO removal)2 External rare earth oxide), the cerium oxide-containing iron slag is burnt at the temperature of 1000 ℃, the heat is preserved for 3 hours, the burnt agglomerate is ground by a vertical mill, and the granularity D is obtained after screening50 A radiation powder in the range of 20-50 μm;
(2) Adding 100 parts of water and 0.5 part of dispersing agent RT-8022 into a size mixing tank, fully stirring, adding 100 parts of radiation powder, stirring for 0.5h to form slurry, starting a size mixing tank and a ball mill communication pump, circularly grinding the slurry through the ball mill, and stopping grinding when the particle size D50 of the radiation powder in the slurry reaches 1 mu m to obtain radiation slurry;
(3) 100 parts of radiation slurry and 100 parts of binder are respectively added into a dispersing tank, wherein the binder comprises 5% by mass (La)0.36 Ce0.64 )PO4 With mass fraction of 50% Al (H)2 PO4 )3 Mixing, namely stirring and dispersing the radiation slurry and the adhesive for 2 hours at a high speed to obtain a radiation material;
(4) Radiation material properties: the full-wavelength integral emissivity of the radiant material is tested to be higher than 0.86 at the working temperature of 25-1250 ℃ by adopting the infrared emissivity tester, and the energy consumption is reduced by 12.3% when the radiant material is applied in an industrial kiln compared with the conventional radiant material. The coating is coated on refractory bricks, the coating is kept at 1200 ℃ for 15min, and water quenching is carried out for 30 times without cracking and falling.
Comparative example 2
A preparation method of a radiation material prepared by cerium-iron oxide slag comprises the following steps:
(1) The iron slag containing cerium oxide is plate frame filter press residue after rare earth is leached out from rare earth iron boron, and the iron slag containing cerium oxide contains main compound Fe2 O3 :56％，CeO2 :7.20％，Al2 O3 :0.45％，B2 O3 0.22%, coO 0.19%, REO 0.2% (REO is CeO removal)2 External rare earth oxide), the cerium oxide-containing iron slag is burnt at 1300 ℃, the temperature is kept for 3 hours, the burnt agglomerate is ground by a vertical mill, and the granularity D is obtained after screening50 A radiation powder in the range of 20-50 μm;
(2) Adding 200 parts of water and 0.5 part of dispersing agent RT-8022 into a size mixing tank, fully stirring, adding 100 parts of radiation powder, stirring for 0.5h to form slurry, starting a pump communicated with the size mixing tank and a ball mill, circularly grinding the slurry through the ball mill, and obtaining the particle size D of the radiation powder in the slurry50 Stopping grinding when the particle size reaches 1 mu m to obtain radiation slurry;
(3) 100 parts of radiation slurry and 100 parts of binder are respectively added into a dispersing tank, wherein the binder comprises 5% by mass (La)0.36 Ce0.64 )PO4 With mass fraction of 50% Al (H)2 PO4 )3 Mixing, namely stirring and dispersing the radiation slurry and the adhesive for 2 hours at a high speed to obtain a radiation material;
(4) Radiation material properties: the full-wavelength integral emissivity of the radiant material is tested to be higher than 0.86 at the working temperature of 25-1250 ℃ by adopting the infrared emissivity tester, and the energy consumption is reduced by 12.6% when the radiant material is applied in an industrial kiln compared with the conventional radiant material. The coating is coated on refractory bricks, the coating is kept at 1200 ℃ for 15min, and water quenching is carried out for 30 times without cracking and falling.
Comparative example 3
A preparation method of a radiation material prepared by cerium-iron oxide slag comprises the following steps:
(1) The iron slag containing cerium oxide is plate frame filter press residue after rare earth is leached out from rare earth iron boron, and the iron slag containing cerium oxide contains main compound Fe2 O3 :56％，CeO2 :7.20％，Al2 O3 :0.45％，B2 O3 0.22%, coO 0.19%, REO 0.2% (REO is CeO removal)2 External rare earth oxide), the cerium oxide-containing iron slag is burnt at 1300 ℃, the temperature is kept for 3 hours, and the burnt agglomerate is ground by a vertical mill and sievedAfter separation, the particle size D is obtained50 A radiation powder in the range of 20-50 μm;
(2) Adding 100 parts of water and 0.5 part of dispersing agent RT-8022 into a size mixing tank, fully stirring, adding 100 parts of radiation powder, stirring for 0.5h to form slurry, starting a size mixing tank and a ball mill communication pump, circularly grinding the slurry through the ball mill, and stopping grinding when the particle size D50 of the radiation powder in the slurry reaches 1 mu m to obtain radiation slurry;
(3) 100 parts of radiation slurry and 300 parts of binder are respectively added into a dispersing tank, wherein the binder comprises 5% by mass (La)0.36 Ce0.64 )PO4 With mass fraction of 50% Al (H)2 PO4 )3 Mixing, namely stirring and dispersing the radiation slurry and the adhesive for 2 hours at a high speed to obtain a radiation material;
(4) Radiation material properties: the infrared emissivity tester is adopted to test that the total-wave integral emissivity of the radiant material is higher than 0.87 at the working temperature of 25-1250 ℃, and the energy consumption is reduced by 13.5% when the radiant material is applied in an industrial kiln compared with the conventional radiant-free material. The coating is coated on refractory bricks, the coating is kept at 1200 ℃ for 15min, and water quenching is carried out for 30 times without cracking and falling.
Comparative example 4
A preparation method of a radiation material prepared by cerium-iron oxide slag comprises the following steps:
(1) The iron slag containing cerium oxide is plate frame filter press residue after rare earth is leached out from rare earth iron boron, and the iron slag containing cerium oxide contains main compound Fe2 O3 :56％，CeO2 :7.20％，Al2 O3 :0.45％，B2 O3 0.22%, coO 0.19%, REO 0.2% (REO is CeO removal)2 External rare earth oxide), the cerium oxide-containing iron slag is burnt at 1300 ℃, the temperature is kept for 3 hours, the burnt agglomerate is ground by a vertical mill, and the granularity D is obtained after screening50 A radiation powder in the range of 20-50 μm;
(2) Adding 100 parts of water and 0.5 part of dispersing agent RT-8022 into a size mixing tank, fully stirring, adding 100 parts of radiation powder, stirring for 0.5h to form slurry, starting a size mixing tank and a ball mill communication pump, circularly grinding the slurry through the ball mill, and stopping grinding when the particle size D50 of the radiation powder in the slurry reaches 1 mu m to obtain radiation slurry;
(3) Respectively adding 100 parts of radiation slurry and 100 parts of adhesive into a dispersion tank, wherein the adhesive is silica sol with the mass fraction of 30%, and dispersing the radiation slurry and the adhesive for 2 hours by high-speed stirring to obtain a radiation material;
(4) Radiation material properties: the infrared emissivity tester is adopted to test that the total-wave integral emissivity of the radiant material is higher than 0.89 at the working temperature of 25-1250 ℃, and the energy consumption is reduced by 14.6% when the radiant material is applied in an industrial kiln compared with the conventional radiant-free material. Coating on refractory bricks, and preserving the temperature of the coating at 1200 ℃ for 15min, wherein the coating is quenched for 20 times to generate cracking and falling phenomena.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.